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Finding the Fourth Proportional to 276.83, 381.71 and 245.70

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Solution

The fourth proportional to 276.83, 381.71 and 245.70 is: 338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.83 : 381.71 = 245.70 : x
  2. Step 2: Convert to fraction form
    276.83/381.71 = 245.70/x
  3. Step 3: Cross multiply
    276.83x = 381.71 × 245.70
  4. Step 4: Simplify right side
    276.83x = 93,786.76
  5. Step 5: Solve for x
    x = 93,786.76/276.83
  6. Step 6: Final answer
    x = 338.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.